Polymer Elements paper-tabs - Error in Polymer 3

Question

After install

npm i @polymer/paper-tabs

and import :

import '@polymer/paper-tabs/paper-tab.js';

import '@polymer/paper-tabs/paper-tabs.js';

Getting error on run :

polymer-fn.js:43 Uncaught (in promise) DOMException: Failed to execute 'define' on 'CustomElementRegistry': this name has already been used with this registry at Polymer (http://localhost:8081/node_modules/@polymer/polymer/lib/legacy/polymer-fn.js:43:18) at http://localhost:8081/node_modules/@polymer/paper-tabs/node_modules/@polymer/paper-ripple/paper-ripple.js:314:1

Answer 1

Inside your project directory, try to:

-install paper-tabs, npm i --save @polymer/paper-tabs

-remove directory node_modules

-remove file packege-lock.json

-reinstall dependencies via npm, npm install

-in my-app.js (see starter-kit) import paper-tabs.js import '@polymer/paper-tabs/paper-tabs.js';